The National Association of Broadcasters (NAB) and the Association for Maximum Service Television (MSTV) have filed suit against the Federal Communications Commission (FCC), following its decision last November to allow the so-called ‘white space’ spectrum for unlicenced wireless applications. ‘White space’ is the term used to describe the spectrum that will be left between the channels when the transition from analogue to digital TV signals is completed this June. Major players, including Hewlett-Packard, Google and Microsoft campaigned heavily for the FCC to open up the spectrum for wireless internet services, but the TV broadcasters claim use of white space spectrum will interfere with their TV signals. The NAB and MSTV have petitioned the legislature to overturn the FCC’s decision, but have not stated on what grounds the decision should be considered illegal. The FCC’s rules on white space devices are due to come into effect on 19 March.